Color printing process



July 14, 1935.

c. OLSEN COLOR PRINTING PROCESS Filed July '7. 1930 12711161120!"- fr/J/cw/ Q/rc/L Patented July 14, 1931 UNITED STATES PATENT OFFICE CHRIS/DEN OLSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO MANZ CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS COLOR PRINTING PROCESS Application filed July 7,

This invention relates to improvements in the art of color printing, and more particularly to the printing of several colors in a multi-color press, including a gold impression. The principal object is to provide an improved process whereby many of the difficulties heretofore attending such multi color printing are eliminated and superior results are obtained.

Multi-color printing presses have been used for printing as many as four or five ordinary colors, but the use of a gold impression has greatly increased the diiiiculties of the printing processes, and it has heretofore 5 been considered impractical to make a gold impression without requiring a separate color press and printing operation. Such gold has usually been applied in the form of a gold bronze powder, which is dusted on a 2o suitably prepared sizing, and requires additional operations for" cleaning the bronze. These gold dusting methods have proved to be relatively slow and expensive, and to give somewhat unsatisfactory results, due to he tendency of the flying dust or metallic powder to spread to other parts of the impression. They are particularly objectionable however, as a possible source of injury to the health of those handling the work who may breathe the flying metallic dust in the air, either during the printing and dusting process, and after the work has been finished, as for instance when the work consists of labels from which portions of the metallic powder are usually dislodged during appli-- cation of the labels to the goods.

In carrying out the present invention, I provide an improved process whereby several colors may be applied in a single multi-color press, including a gold impression in the form of moist gold ink, all of said colors being prepared and applied in an especial rotation so as to make the proper color effect, and at the same time create a surface that has an afiinity for a moist gold ink, which is applied last in the rotation of colors.

Referring now to a specific illustration in which my improved invention may be carried out, the single fi ure of the accompanying drawing shows a label or print 10, part in 1930. Serial No. 466,369.

perspective and part in section, and in which red areas 11, green areas 12, black areas 13 and gold areas 14 are to appear. I find that it is possible to produce these colors consecutively in a five color press by printing the ordinary colors such as red, green and-black first, then applying a suitable sizing, 15, to

cover such blank areas 16 as are left uncovered by the previously applied color inks, then last applying the gold in the form of a moist ink. I find that the rotation of the ordinary or base colors, red, green and black,

is not essential, although in practice best results have been obtained by rotating them in the order mentioned. It is desirable however, that the color inks referred to be compounded with a suitable mixture of gum adhesive, in addition to their usual content of linseed varnish and dry color. I find that In general I find that the addition of gum."

adhesive so as to constitute approximately 10% by weight of the final color ink gives satisfactory results for the described purose. p After the specially prepared base colors have been applied, I next apply a suitable sizing which consists of a suitable color or colorless ink body, also made of linseed varnish and dry color, with the addition of a gum adhesive of the same character and proportions as is added to the colors previously described. Finally a moist gold ink of the type well known in the art, is applied while they are wet.

A suitable moist gold ink for the purpose is made up of approximately one part by 'weight of linseed varnish to two bronze powder.

I find that the surface formed by the preparts of fine viously applied colors or sizing is. of such ink and receive it thereon in a permanent, then applying a moist gold ink while the sharply defined. impression which, after first named colors are wet.

drying in'the usual manner, produces a du- Signed at Chicago, 111., this 3rd day of rable, clean, final product which is much more July, 1930.

5 satisfactory than can be obtained from any CHRISTE'N OLSEN. 70

methods heretofore utilized for a similar purpose.

While I am aware that moist gold or gold ink of the general type which I used as the base of my gold ink, has been used in ordi- 7 nary printing, I consider it new to the super impose such gold ink on the specially prepared colors and sizing while wet, and thus overcome the drying difiiculties heretofore encountered in the ordinary printing of gold 80 ink. I find further by the successive printing of, the ditlerent'colors ina single multicolor press as described, the work may be produced at aspeed approximately twice the rate of former printing methods, and at the same time produce work which is much better in quality and appearance and more coo nomical in cost to produce.

It will be understood, of course, that my invention is not limited to the use of the colors K 90 red, green and black Which'have been above.

mentioned as being applied before the gold sizing and gold ink, but that any other combination'of colors may be used in a similar manner. The principal feature, therefore, 95

of my method is the rotation of the other fcolor inks before the moist gold is applied. I claim- 1. The process of multi-color printing in- I eluding a gold impression which consists of s first applying one.or more color inks, then a size, and then a gold ink while the color ink and size are Wet. I

2. The process of multi-eolor printing in- 40 eluding a gold impression which consists in I 5 first applying one or more color inks, then applying size, botlr said; color ink'and' size includinga gumadi'i esi'tq and then applying a gold ink while theeoIor ink and size are wet. l

3. The pr'deessbf multi-color printing including red,,..green, black: and goldfimpres sioniwhich consists in initially mixing with the 'fi een and black col'orinks a gur'rr" 0 and applying them in the rotation mentioned, and then applying a moist gold while the first named colors are wet.

The process of multi-color printing including red, green, black and gold impression which consists in initially mixing with the red, green and black color inks a gum adhesive, and applying them in the rotation mentioned supra-imposing a size including a gum 6Q adhesive, and then applying a moist gold ink 105 while the first niuncd colors are Wet. I H

5. The proeessot multi-color printing including a gold impression which consists in first applying one or more color inks, includ- 65 mg as an added element a gum adhesive, and 

